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Mockito mock objects library core API and implementation

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/*
 * Copyright (c) 2019 Mockito contributors
 * This program is made available under the terms of the MIT License.
 */
package org.mockito.internal.configuration;

import java.lang.annotation.Annotation;

import org.mockito.DoNotMock;
import org.mockito.plugins.DoNotMockEnforcer;

public class DefaultDoNotMockEnforcer implements DoNotMockEnforcer {

    @Override
    public String checkTypeForDoNotMockViolation(Class type) {
        for (Annotation annotation : type.getAnnotations()) {
            if (annotation.annotationType().getName().endsWith("org.mockito.DoNotMock")) {
                String exceptionMessage =
                        type + " is annotated with @org.mockito.DoNotMock and can't be mocked.";
                if (DoNotMock.class.equals(annotation.annotationType())) {
                    exceptionMessage += " " + type.getAnnotation(DoNotMock.class).reason();
                }

                return exceptionMessage;
            }
        }

        return null;
    }
}